One-step synthesis of hollow UO2 nanospheres via radiolytic reduction of ammonium uranyl tricarbonate

Hollow nanospheres (ϕ: 30-50 nm, wall thickness: 8-15 nm, cavity diameter: 10-20 nm), consisted of UO2 nanoparticles (ϕ: 3-5 nm), were successfully obtained by the radiolytic reduction of ammonium uranyl tricarbonate in the HCOONH4 aqueous solution through gas-bubble assembly mechanism.93